Record details

    Source mechanisms of micro-earthquakes induced in a fluid injection experiment at the HDR site Soultz-sous-For?ts (Alsace) in 2003 and their temporal and spatial variations
    Dorbath, L.
    Horálek, Josef
    Jechumtálová, Zuzana
    Šílený, Jan
Publication type
    článek v odborném periodiku
Source title - serial
    Geophysical Journal International
    Roč. 181, č. 3
    s. 1547-1565
    Projekt: GA205/09/0724, GA ČR3cav_un_auth*0252832
    Projekt: IAA300120911, GA AV ČR3cav_un_auth*0252829
    Projekt: MTKI-CT-2004-517242, EU, XE3cav_un_auth*0250446
    Rozsah: 19 s.
    Výzkumný záměr: CEZ:AV0Z30120515
Subject category
    controlled source seismology
    downhole methods
    earthquake source observations
    fracture and flow
Abstract (in english)
   We have inverted the peak amplitudes of direct P waves of 45 micro-earthquakes with magnitudes between M = 1.4 and 2.9, which occurred during and after the 2003 massive fluid injection in the GPK3 borehole of the Soultz-sous-Forets Hot Dry Rock facility. These events were recorded by a surface seismic network of 15 stations operated by the Ecole et Observatoire des Sciences de la Terre, University of Strasbourg. The unconstrained moment tensor (MT) expression of the mechanism was applied, allowing the description of a general system of dipoles, that is, both double-couple (DC) and non-DC sources, as tensile fractures. The mechanisms of all but one event are dominantly DCs with a few per cent additional components at the most.
    AV ČR Brno, Geofyzikální ústav
Contributor code
    AV ČR, GFÚ
Source format
Import date
    9. 12. 2013